HSC Niche (IMAGE) Stowers Institute for Medical Research Caption A quiescent hematopoietic stem cell (white) engages in a molecular dialog with a preosteoblast (blue). The communication takes place via Flamingo (shown in red) and Frizzled (green), which are found at the interface between the two. Credit Courtesy of Ryohichi Sugimura, Stowers Institute for Medical Research Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.